Final answer:
The effect of the construction company changing its accounting method on prior periods should be reported as a credit of $540,000 on the 2013 retained earnings statement, reflecting the after-tax cumulative difference between the two methods from 2011 to 2013.
Step-by-step explanation:
The question involves a construction company that changed its accounting method from the completed contract method to the percentage-of-completion method. The effect of this change on prior periods would be reflected in a cumulative effect adjustment in the year of change.
The cumulative difference in gross profit figures between the completed-contract method and the percentage-of-completion method from 2011 to 2013 is $900,000 ($2,700,000 - $1,800,000). Considering a tax rate of 40%, the net effect would be $900,000 - 40% of $900,000 = $540,000. Since this adjustment relates to prior periods, it should be reported as an adjustment to the beginning balance of retained earnings, not on the income statement.
Therefore, the correct answer would be a credit of $540,000 on the 2013 retained earnings statement.